Agro-industrial co-products in feed for piglets/ Coprodutos da agroindustria na alimentacao de leitoes

One experiment was realized to determine the chemical composition and digestibility of nutrients and energy of shoestring potatoes residues (SP), sweet popcorn residues (SPC), wheat sweet biscuit residues (WSB) and wheat salted sticks residues (WSS) for piglets. The dry matter (DM), crude protein (CP), ether extract (EE), mineral matter (MM), calcium (Ca), phosphorus (P) and sodium (Na) and gross energy (GE) were measured. Eighteen castrated pigs penned in metabolic crates during two consecutive periods of 12 days (seven to adaptation and five to feces collection) were used to evaluate the digestibility's coefficients of feedstuffs. The SP, SPC, WSB, and WSS had relatively low CP values 7.2; 6.0; 6.8 and 3.4%, respectively. The EE contents were 39.64; 7.12; 12.40 and 22.28% for SP, SPC; WSB and WSS, respectively. All the co-products evaluated had low values of Ca and P and anyone had a Ca and P value higher than 0.18% and the SPC and WSS had high Na levels (0.9 and 1.36%, respectively). The GE were 5.686; 3.995; 3.916; 4.953kcal [kg.sup.-1] for SP, SPC; WSB and WSS, respectively and showed positive linear correlation ([r.sup.2] = 0.97; P < 0.05) with EE levels. Additional studies are necessary to establish the optimal levels of co-products to include in pigs diets. However, the results of chemical composition and digestibility of nutrients and energy indicate that shoestring potatoes residues, sweet popcorn residues, wheat sweet biscuit residues and wheat salted sticks residues have potential to be used in piglet's diets. Key words: animal nutrition, by-product, co-product, digestible energy, pig. Foi realizado um experimento para determinar a composicao quimica e digestibilidade dos nutrientes e energia do residuo de batata palha (RBP), residuo de pipoca doce (RPD), residuo de biscoito de trigo doce (RBT), e residuo de biscoito de trigo salgado (RBS) para leitoes. Foram determinados os valores de materia seca (MS), proteina bruta (PB), extrato etereo (EE), materia mineral (MM), calcio (Ca), fosforo (P), sodio (Na) e energia bruta (EB). A digestibilidade dos alimentos foi avaliada utilizando 18 suinos alojados em gaiolas de metabolismo durante dois periodos consecutivos de 12 dias, sendo sete para adaptacao e cinco destinados a coleta total de fezes. Os resultados de PB obtidos foram relativamente baixos, sendo 7,2; 6,0; 6,8 e 3,4% para o RBP, RPD, RBT e RBS, respectivamente. Os conteudos de EE foram de 39,64; 7,12; 12,40; e 22,28%para o RBP, RPD, RBT e RB